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We present measurements of the star formation rate (SFR) in the early-type galaxies (ETGs) of the ATLAS3D sample, based on Wide-field Infrared Survey Explorer (WISE) 22um and Galaxy Evolution Explorer (GALEX) far-ultraviolet emission. We…

In the Local Group spiral galaxy M33, we investigate the correlation between the star formation rate (SFR) surface density, Sigma_SFR, and the gas density Sigma_gas (molecular, atomic, and total). We also explore whether there are other…

宇宙学与河外天体物理 · 物理学 2015-05-14 S. Verley , E. Corbelli , C. Giovanardi , L. K. Hunt

The observationally derived Kennicutt-Schmidt (KS) relation slopes differ from study to study, ranging from sub-linear to super-linear. We investigate the KS-relation variety (slope and normalization) as a function of integrated intensity…

星系天体物理 · 物理学 2017-03-22 Kana Morokuma-Matsui , Kazuyuki Muraoka

This letter utilizes composite spectral energy distributions (SEDs) constructed from NEWFIRM Medium-Band Survey photometry to constrain the dust attenuation curve in 0.5<z<2.0 galaxies. Based on similarities between the full SED shapes…

宇宙学与河外天体物理 · 物理学 2015-06-16 Mariska Kriek , Charlie Conroy

One of the most important and well-established empirical results in astronomy is the Kennicutt-Schmidt (KS) relation between the density of interstellar gas and the rate at which that gas forms stars. A tight correlation between these…

The scaling relations between the gas content and star formation rate of galaxies provide useful insights into processes governing their formation and evolution. We investigate the emergence and the physical drivers of the global…

[ABRIDGED] We derive the dust properties for 753 local galaxies and examine how these relate to some of their physical properties. We model their global dust-SEDs, treated statistically as an ensemble within a hierarchical Bayesian dust-SED…

星系天体物理 · 物理学 2019-10-23 Sophia Lianou , Pauline Barmby , Aleksandr Mosenkov , Matthew Lehnert , Oskar Karczewski

We provide fits to the distribution of galaxy luminosity, size, velocity dispersion and stellar mass as a function of concentration index C_r and morphological type in the SDSS. We also quantify how estimates of the fraction of `early' or…

宇宙学与河外天体物理 · 物理学 2015-05-14 M. Bernardi , F. Shankar , J. B. Hyde , S. Mei , F. Marulli , R. K. Sheth

For four well studied spiral galaxies (M33, M81, M100 and M101) we consider the dependencies of star formation rate (SFR) and star formation efficiency (SFE = SFR/M_{gas}) both on the radial distance R and on some kinematic parameters of…

天体物理学 · 物理学 2009-11-11 A. V. Zasov , O. V. Abramova

We study the total density distribution in the central regions (~ 1 effective radius, $R_e$) of early-type galaxies (ETGs), using data from SPIDER and $\rm ATLAS^{3D}$. Our analysis extends the range of galaxy stellar mass ($M_{\star}$)…

星系天体物理 · 物理学 2015-06-22 C. Tortora , F. La Barbera , N. R. Napolitano , A. J. Romanowsky , I. Ferreras , R. R. de Carvalho

We address a simple model where the Kennicutt-Schmidt (KS) relation between the macroscopic densities of star-formation rate (SFR, $\rho_{\rm sfr}$) and gas ($n$) in galactic discs emerges from self-regulation of the SFR via supernova…

The Kennicutt-Schmidt (KS) relation between the gas mass and star formation rate (SFR) describes the star formation regulation in disk galaxies. It is a function of gas metallicity, but the low metallicity regime of the KS diagram is poorly…

星系天体物理 · 物理学 2016-04-13 M. E. Filho , J. Sánchez Almeida , R. Amorín , C. Muñoz-Tuñón , B. G. Elmegreen , D. M. Elmegreen

Whilst the star formation rate (SFR) of molecular clouds and galaxies is key in understanding galaxy evolution, the physical processes which determine the SFR remain unclear. This uncertainty about the underlying physics has resulted in…

星系天体物理 · 物理学 2015-05-14 Diane M. Salim , Christoph Federrath , Lisa J. Kewley

We provide a model for how Kennicutt-Schmidt (KS) laws, which describe the correlation between star formation rate and gas surface or volume density, depend on the molecular line chosen to trace the gas. We show that, for lines that can be…

天体物理学 · 物理学 2009-11-13 Mark R. Krumholz , Todd A. Thompson

Observations of external galaxies and of local star-forming clouds in the Milky Way have suggested a variety of star formation laws, i.e., simple direct relations between the column density of star formation (Sigma_SFR: the amount of gas…

星系天体物理 · 物理学 2013-12-12 Christoph Federrath

We explore using our continuity approach the underlying connections between the evolution of the faint-end slope of the stellar mass function of star-forming galaxies, the logarithmic slope of the sSFR-mass relation and the merging of…

星系天体物理 · 物理学 2014-07-21 Yingjie Peng , Simon J. Lilly , Alvio Renzini , C. Marcella Carollo

We present a systematic study of the shape of the dust attenuation curve in star-forming galaxies from the far ultraviolet to the near infrared (0.15-2microns), as a function of specific star formation rate (sSFR) and axis ratio (b/a), for…

宇宙学与河外天体物理 · 物理学 2015-05-28 Vivienne Wild , Stephane Charlot , Jarle Brinchmann , Timothy Heckman , Oliver Vince , Camilla Pacifici , Jacopo Chevallard

We present an analysis of the relation between star formation rate (SFR) surface density (sigmasfr) and mass surface density of molecular gas (sigmahtwo), commonly referred to as the Kennicutt-Schmidt (K-S) relation, at its intrinsic…

星系天体物理 · 物理学 2015-05-20 Viviana Casasola , Leslie Hunt , Francoise Combes , Santiago Garcia-Burillo

Aims: The complexity of star formation at the physical scale of molecular clouds is not yet fully understood. We investigate the mechanisms regulating the formation of stars in different environments within nearby star-forming galaxies from…

We study the stellar mass function (SMF) and the co-evolution with dark matter halos via abundance matching in the largest redshift range to date $0.2<z<12$ in $0.53 \, {\rm deg}^2$ imaged by JWST from the COSMOS-Web survey. At $z>5$, we…